GB494652A - Improvements in or relating to mercury-cathode discharge tubes - Google Patents

Improvements in or relating to mercury-cathode discharge tubes

Info

Publication number
GB494652A
GB494652A GB10714/38A GB1071438A GB494652A GB 494652 A GB494652 A GB 494652A GB 10714/38 A GB10714/38 A GB 10714/38A GB 1071438 A GB1071438 A GB 1071438A GB 494652 A GB494652 A GB 494652A
Authority
GB
United Kingdom
Prior art keywords
electrode
source
condenser
ignition
discharge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB10714/38A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB494652A publication Critical patent/GB494652A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J13/00—Discharge tubes with liquid-pool cathodes, e.g. metal-vapour rectifying tubes
    • H01J13/02—Details
    • H01J13/34—Igniting arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J13/00—Discharge tubes with liquid-pool cathodes, e.g. metal-vapour rectifying tubes
    • H01J13/02—Details
    • H01J13/48—Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0072—Disassembly or repair of discharge tubes
    • H01J2893/0073—Discharge tubes with liquid poolcathodes; constructional details
    • H01J2893/0074—Cathodic cups; Screens; Reflectors; Filters; Windows; Protection against mercury deposition; Returning condensed electrode material to the cathodic cup; Liquid electrode level control
    • H01J2893/0087—Igniting means; Cathode spot maintaining or extinguishing means

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

494,652. Converting. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN. April 7, 1938, No. 10714. Convention date, April 10, 1937. [Class 38 (ii)] [Also in Group XL] A mercury converter is provided with an auxiliary electrode which is arranged in the immediate vicinity of the cathode spot and is adapted to extinguish the main discharge when a positive voltage impulse is applied thereto. The main discharge is transferred from the main anode to the electrode upon the application of the impulse, and when the electrode becomes negative, as the result of oscillations in the circuit of the auxiliary electrode, the discharge is extinguished. The resistance of the electrode circuit should preferably be lower than 0À1 ohms. In one form, a converter 1, Fig. 1 is connected to a source 7 of continuous current through a load 8. An ignition electrode 5 is connected through a switch 10 and resistance 9 to the source 7. The auxiliary electrode 6 is arranged over an anchoring member 3 and the extinguishing potential is applied thereto by the discharge of a condenser 11 through a switch 12. The voltage across the condenser may be increased by the use of an additional source. In another form, a converter 1, Fig. 2, is connected to an A.C. source 13 through the load 8. The auxiliary electrode for extinguishing the arc is formed by the metallic holder 15, suitably extended, of the high-resistance ignition electrode 14. Condensers 21, 22 are charged positively during the blocking phase through a transformer 16 and valves 19, 20. A synchronous motor 25 connected to the A.C. source, drives rotary contacts 23, 24 which connect the condensers periodically to the ignition and control electrode. The condenser 21 is used for extinguishing the arc and the condenser 22 for ignition. The value of the rectified current may be controlled by adjusting the moment of extinction.
GB10714/38A 1937-04-10 1938-04-07 Improvements in or relating to mercury-cathode discharge tubes Expired GB494652A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE494652X 1937-04-10

Publications (1)

Publication Number Publication Date
GB494652A true GB494652A (en) 1938-10-28

Family

ID=6544756

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10714/38A Expired GB494652A (en) 1937-04-10 1938-04-07 Improvements in or relating to mercury-cathode discharge tubes

Country Status (1)

Country Link
GB (1) GB494652A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1247493B (en) * 1955-04-23 1967-08-17 Siemens Ag Process for the controlled extinguishing of the discharge of gas or vapor discharge vessels using a short-term auxiliary discharge and application of the process

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1247493B (en) * 1955-04-23 1967-08-17 Siemens Ag Process for the controlled extinguishing of the discharge of gas or vapor discharge vessels using a short-term auxiliary discharge and application of the process

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